Question 1

Friction can be seen everywhere. Which of the following statements is true about friction?

Accepted Answer

D. It always opposes motion.

Answer

A. It only exists when there is motion.

Answer

C. It acts on the same direction.

Answer

B. It is the same as kinetic friction.

Question 2

To increase machine effectiveness, you apply lubricants. Which of the following cannot be used as lubricant?

Accepted Answer

A. alcohol

Answer

D.  wax

Answer

C. oil

Answer

B. grease

Question 3

Friction plays an important role in your life. Which of the following statements is true?

Accepted Answer

B. It slows down or stops objects in motion.

Answer

A. It does not affect the motion of an object.

Answer

D. It pulls all objects towards the center of the Earth.

Answer

C. It is only present if gravity is also present.

Question 4

Force is push or pull that acts on an object. Which of the following is a force that opposes motion

Accepted Answer

B. friction

Answer

A. acceleration

Answer

C. gravity

Answer

D. mass

Question 5

The effect of friction can be desirable or undesirable. Which of the following shows an undesirable effect of friction?

Accepted Answer

C. It converts energy to heat and noise.

Answer

B. It reduces speed of a moving vehicle.

Answer

A. It allows you to grip things.

Answer

D. It helps in converting one form of motion into another.

Question 6

A child accidentally slides on a wet floor. What causes the child to slide on the floor?

Accepted Answer

B. friction

Answer

D.  volume

Answer

C. gravity

Answer

A. air resistance

Question 7

It will be difficult if there is no friction. Which of the following sentences best describes frictional force?

Accepted Answer

C. It occurs when two surfaces touch against each other.

Answer

B. It only occurs between solid surfaces and liquid surfaces.

Answer

A. It occurs when two surfaces do not touch against each other.

Answer

D. It occurs on one surface.

Question 8

8. Rubbing your hands show frictional force. What do you create when you rub your hands?

Accepted Answer

B. heat

Answer

C. mass

Answer

A. gravity

Answer

D. volume

Question 9

A book on top of the table shows static friction. What do you think is static friction?

Accepted Answer

A. It is the strongest friction that keeps the book motionless.

Answer

C. It is the least friction that keeps the book motionless.

Answer

D. It is the least friction the keeps the book in motion.

Answer

B. It is the strongest friction that keeps the book in motion.

Question 10

Friction is present in our everyday lives. Which of the following situations involve friction?

Accepted Answer

C. Rolling ball in a smooth surface.

Answer

A. Diver falling in the pool.

Answer

B. Dropping water on the faucet.

Answer

D. Falling debris in a construction site.

Question 11

What causes the objects to fall toward the earth’s center?

Accepted Answer

C. gravity

Answer

A. acceleration

Answer

D. mass

Answer

B. friction

Question 12

Gravity attracts all physical bodies. Which of the following statements is true about gravity?

Accepted Answer

C. It pulls objects toward the ground.

Answer

D. It is grater on rough surfaces.

Answer

A. It stops the rotation and revolution of Earth.

Answer

B. It pushes everything away from the Earth.

Question 13

Gravity affects movement of an object. Which of the following situations show the effect of gravity?

Accepted Answer

C. Fruit falling from the tree.

Answer

D. Lighting a matchstick.

Answer

A. Rolling ball suddenly slows down and stops.

Answer

B. Appling breaks to stop a vehicle.

Question 14

Gravity pulls us down. What might happen if you move against gravity?

Accepted Answer

D. More force will be needed

Answer

A. No force is needed

Answer

C. Less force will be needed

Answer

B. Nothing will happen

Question 15

Gravity keeps the moon in orbit around the Earth. What will happen to the gravitational force if the moon is closer to Earth?

Accepted Answer

A. Increases

Answer

B. Decreases

Answer

D. Remains the same

Answer

C. Disappears

Question 16

Gravity pulls an object downward. How do you describe gravity?

Accepted Answer

A. a force

Answer

D. a substance

Answer

B. an illusion

Answer

C. an object

Question 17

You need force to jump. What force did you overcome after jumping ?

Accepted Answer

C. gravity

Answer

A. air

Answer

D. weight

Answer

B. friction

Question 18

What is the effect of the Earth’s gravity on us?

Accepted Answer

D. It pulls us to the Earth’s center

Answer

C. It moves us in a circle path.

Answer

B. It pushes us out of the Earth.

Answer

A .It makes us float inside the Earth.

Question 19

Why does a bicycle travel faster when moving down than moving up?

Accepted Answer

C. It is moving towards the pull of gravity

Answer

D. It is pulled through the weight of the bicycle

Answer

A. It goes against the pull of gravity.

Answer

B. It is pushed by the wind.

Question 20

Gravity depends on the mass of an object. Which of the following would be most difficult to lift against gravity?

Accepted Answer

B. car

Answer

A. ball

Answer

C. chair

Answer

D. pen

Question 21

Which energy causes us to perspire during summer days?

Accepted Answer

B. heat

Answer

A. electrical

Answer

C. light

Answer

D. sound

Question 22

We use headphones when we talking to someone in a cellphone. What are forms of energy present in headphones?

Accepted Answer

B. electrical and sound

Answer

D. light and sound

Answer

A. electrical and light

Answer

C. heat and sound

Question 23

Solar panels or solar cells do not make use of costly fuel and make no noise or pollution. Which energy does it get from the sun?

Accepted Answer

B. heat

Answer

A. electrical

Answer

C. light

Answer

D. sound

Question 24

As solar panels get enough energy from the sun, which does it produce?

Accepted Answer

A. electrical

Answer

D. sound

Answer

B. heat

Answer

C. light

Question 25

What form of energy are produced when a phone rings?

Accepted Answer

D. sound

Answer

B. heat

Answer

C. light

Answer

A. electrical

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